<template>
  <div id="app">
    <div>
      <span>姓名:</span>
      <input type="text" v-model.trim="username" />
    </div>
    <div>
      <span>年龄:</span>
      <input type="number" v-model.number="userage" />
    </div>
    <div>
      <span>性别:</span>
      <select v-model="gender">
        <option value="男">男</option>
        <option value="女">女</option>
      </select>
    </div>
    <div>
      <button @click="add">添加/修改</button>
    </div>
    <div>
      <table
        border="1"
        cellpadding="10"
        cellspacing="0"
        v-show="dataArr.length > 0"
      >
        <tr>
          <th>序号</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>操作</th>
        </tr>
        <tr v-for="(item, index) in dataArr" :key="index">
          <td>{{ index + 1 }}</td>
          <td>{{ item.name }}</td>
          <td>{{ item.age }}</td>
          <td>{{ item.sex }}</td>
          <td>
            <button @click="aaa(index)">删除</button>
            <button @click="ccc(index)">编辑</button>
          </td>
        </tr>
      </table>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      username: "",
      userage: 0,
      gender: "",
      end: null,
      dataArr: [
        {
          name: "Tom",
          age: 19,
          sex: "男",
        },
        {
          name: "Jone",
          age: 21,
          sex: "女",
        },
      ],
    };
  },
  methods: {
    add() {
      let newobj = {
        name: this.username,
        age: this.userage,
        sex: this.gender,
      };
      if (this.end !== null) {
        this.$set(this.dataArr, this.end, newobj);
        this.end = null;
      } else {
        this.dataArr.push(newobj);
      }
    },
    aaa(ind) {
      this.dataArr.splice(ind, 1);
    },
    ccc(indx) {
      let cccobj = this.dataArr[indx];
      this.username = cccobj.name;
      this.userage = cccobj.age;
      this.gender = cccobj.sex;
      this.end = indx;
    },
  },
};
</script>

